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Len [333]
2 years ago
9

The area of one side of a skyscraper is 90,000 square feet. The area of the corresponding side of a scale model is 200 square in

ches. If the skyscraper is 720 feet tall, about how tall is the model?
Mathematics
1 answer:
Varvara68 [4.7K]2 years ago
7 0
90000 is 450 times to 200^inches (there is not width is given)

1.6inch  i guess..am not sure..need  to wait for more answer
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8. Is the following statement true or false? Justify your conclusion. If a and b are nonnegative real numbers and a + b =0, then
atroni [7]

Answer:

If a + b = 0 then a = 0 and b =0

a  | b | a + b (answer)

0 | 0 | 0

0 | 1  | 1

0 | 2 | 2

1  | 0 | 1

2 | 0 | 2

1  | 1  | 2

2 | 1  | 3

 

Step-by-step explanation:

Considering the following conditions for the real numbers:

a\geq 0\\b\geq 0

Following the rules of these in-equations, it is possible to deduce:

a + b \geq 0

Then, if the proposed statement is:

a + b = 0

The conditions above shall comply the requirements established, but first, analyzing the statement:

If a \geq 0 and b \geq 0 then a + b \geq a, a + b \geq b and a + b \geq 0.

If a = 0 and b a non negative real number, then a + b \geq b, but because to a = 0, then a + b = b. Due to the commutative property of sums, the same behavior will be presented if b = 0 and a a non negative real number.

According to that, if  a + b = 0, then a = 0 and b = 0.

7 0
3 years ago
In 1920, a woman had 4 daughters. In 1950, each daughter had 3 daughters. In 1980, each of their daughters had 3 daughters. Fina
neonofarm [45]

Answer:3

Step-by-step explanation:

6 0
3 years ago
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liza's friend marie bought her a dress for 250 euros in france. liza wants to pay marie for it in u.s. dollars. if the foreign e
Rudik [331]
1/ 0.6 = x / 250..1 dollar to 0.6 euros = x dollars to 250 euros
cross multiply
(0.6)(x) = (250)(1)
0.6x = 250
x = 250/0.6
x = 416.67 american dollars
8 0
3 years ago
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Please help for a big part of my grade
Reil [10]

Answer:The answer would be C-13

Step-by-step explanation:You would get C because you are going up 3 cubes every shape so 7 plus 3 is 10 then for the fifth shape 10 plus 3 is 13 and that is the finale answer

6 0
2 years ago
What is the value of x if:<br> -0.1x + 3/10 = 4/10<br> Solve as linear equation.<br> NEED HELP ASAP
Anika [276]

Answer:

x= -1

Step-by-step explanation:

Solving through linear equation,

-0.1x + 3/10= 4/10

Bring 3/10 to the other side making it minus

-0.1x = 4/10 - 3/10

-0.1x = (4-3)/10

-0.1x= 1/10

Bring -0.1 to the other side n divide

x= 1/10 ÷ -0.1

( Note that -0.1 is the same as -1/10)

x = 1/10 ÷ -1/10

= 1/10*-10/1

= -10/10

= -1

3 0
3 years ago
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